
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 200px;
            height: 100px;
            padding: 10px;
            border: 1px solid #000;
            margin: 20px;
        }
        .content-box{
            box-sizing: content-box;
        }
        .border-box{
            box-sizing: border-box;
        }
    </style>
</head>
<body>
<!-- 标准盒模型 -->
<div class="content-box">
    我是content-box
</div>
<!-- 怪异盒模型 -->
<div class="border-box">
    我是border-box
</div>
</body>
</html>